RE: relative colorimetric without black point compensation
RE: relative colorimetric without black point compensation
- Subject: RE: relative colorimetric without black point compensation
- From: Roger <email@hidden>
- Date: Sat, 24 Jan 2009 21:12:08 -0500
It couldn't be called a "kludge", it's just that, historically, at the
exception of a handful of companies (ex:HDM), no one adopted Perceptual
Rendering intent for converting photos, which is the true essence of gamut
mapping, in my opinion, from a large color space to a smaller color space.
So a solution had to be found to make RelCol mimic Perceptual, thereby Adobe
coming out with BPC. Now, all CMS support BPC at the CMM level, it even
found it's way into the specs, I believe. And many profilers just populate
the Perceptual Rendering tag with RelCol information. Might as well kill
Perceptual? I'd say, each RI has its justification. I use Perceptual to
convert images from RGB or Lab to CMYK all the time -- call me old fashion
-- and I use RelCol or AbsCol for proofing all the time.
Roger
>
> Hmm. When you want Relative colorimetric ?
> With BPC added into the mix, it is no longer Relative Colorimetric,
> it's
> a pseudo-perceptual rendering intent (gamut adapted in L* but not a*
> and b*).
>
> Graeme Gill.
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